Why not boot into "safe-mode" as admin. then make changes. Of course, you need to know any password, etc to proceed.
tada -----Willy ![]()
PC asked for administrative rights when I tried to change date and time that somehow got set for Jan. 2007 which may have happened when I system restored it a few weeks ago because it was made at that time.I am the only user and owner but PC thinks every site I go to is untrusted because licence or certificate is ahead of current date so firefox thinks it is fraudulent also.Can someone help me out

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